code: def getRSI(self):
      return self.__rsi
  
file_path: pyalgotrade/samples/rsi2.py
imports: from pyalgotrade import strategy
  from pyalgotrade.technical import ma
  from pyalgotrade.technical import rsi
  from pyalgotrade.technical import cross
label_desc: Use image node_id 4 for calling the RSI2 obj's underlying member method code with example usage: obj.getRSI() and returns: self